Gnome 3 is a least a little risky with ubuntu for now-
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The Desktop Team has been very busy getting Ubuntu 11.04 out the door. The transition to Gnome 3 is very big and there has not been sufficient time or attention put into the Gnome3 PPA so it is still experimental and not recommended for use.
In other words, installing the PPA and upgrading your system will definitely result in you having various issues even in Unity. The gsettings migration also causes many integration issues. I have previously lost work because of gnome-power-manager problems when the computer auto shut off because I was unaware that my laptop had become unplugged 2 hours previous.
Do not even attempt to use the PPA unless you are very familiar with how ppa-purge works.
For a smooth Gnome 3 experience on Ubuntu, wait 6 months for Ubuntu 11.10. The PPA may get better in the next few weeks but there are limits to what can be accomplished in a PPA
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http://askubuntu.com/questions/37600...ow/37804#37804
This is worth seeing as well (same url)-
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It is possible to get Gnome3 working in Ubuntu 11.04(Unity, Ubuntu Classic and etc will not be available after install).
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So if you do install gnome 3 going, you will lose unity and ubuntu-classic (aka gnome 2.X).
I wouldnt be suprised if canonical left gnome 3 out of the offical repos for 11.10, and even beyond then. Gnome 3 is competition for unity.
